Interpretation of Creep Properties of Geogrid under Simulated Seismic Event Condition by SIM(Stepped Isothermal Method) Test

摘要

Usually, the lifetimes of geogrid are assessed as the long-term creepbehavior which causes shape deformation and collapse of the slopesand embankments. During an earthquake, the structure is subjected toadditional loads, which may influence the creep characteristics of thereinforcement. The SIM (stepped isothermal method) test provides anopportunity to study the effect of simulated seismic events or theinfluence of other additional loads, occurring at different intervals ofthe life of the structure, on the long-term strength of geosyntheticreinforcement. In this paper, two simulated seismic event related toSIM tests were performed, one with a simulated seismic event at 23°Cstep, the other tests carried out after 79°C step. Creep strain decreasedafter seismic event cause of recovery force, then strain increased again.After same conditions of seismic event in different times were applied,strain finally overlapped.